Body Surface Area (BSA) Calculator

Body Surface Area (BSA) is evaluated from Weight and Height. The calculation reports Mosteller, DuBois & DuBois and Haycock.

Results

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About the Body Surface Area (BSA) Calculator

Body Surface Area (BSA) is treated here as a quantitative relation between Weight and Height and Mosteller, DuBois & DuBois, Haycock and Boyd.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Mosteller: BSA = sqrt(Height x Weight / 3600)
DuBois: BSA = 0.007184 x Height^0.725 x Weight^0.425
Haycock: BSA = 0.024265 x Height^0.3964 x Weight^0.5378
Boyd: BSA = 0.0003207 x Height^0.3 x Weight^(0.7285 - 0.0188 x log10(Weight))
Height in cm, Weight in kg → BSA in m^2

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Mosteller: BSA = sqrt(Height x Weight / 3600)
DuBois: BSA = 0.007184 x Height^0.725 x Weight^0.425
Haycock: BSA = 0.024265 x Height^0.3964 x Weight^0.5378
Boyd: BSA = 0.0003207 x Height^0.3 x Weight^(0.7285 - 0.0188 x log10(Weight))
Height in cm, Weight in kg → BSA in m^2

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Average Adult Male — 80 kg, 178 cm

Inputs

weight_kg: 80 height_cm: 178
Mosteller: 1.989 m^2. DuBois & DuBois: 1.98 m^2. Haycock: 1.998 m^2. Boyd: 0.032 m^2. Average BSA: 1.5 m^2

With Weight = 80 and Height = 178 as the stated inputs, the result is Mosteller = 1.989 m^2, DuBois & DuBois = 1.98 m^2 and Haycock = 1.998 m^2. Each value corresponds to the declared output fields.

Example 2: Average Adult Female — 65 kg, 165 cm

Inputs

weight_kg: 65 height_cm: 165
Mosteller: 1.726 m^2. DuBois & DuBois: 1.716 m^2. Haycock: 1.734 m^2. Boyd: 0.027 m^2. Average BSA: 1.301 m^2

With Weight = 65 and Height = 165 as the stated inputs, the result is Mosteller = 1.726 m^2, DuBois & DuBois = 1.716 m^2 and Haycock = 1.734 m^2. Each value corresponds to the declared output fields.

Example 3: Pediatric Patient — 20 kg, 115 cm

Inputs

weight_kg: 20 height_cm: 115
Mosteller: 0.799 m^2. DuBois & DuBois: 0.8 m^2. Haycock: 0.797 m^2. Boyd: 0.011 m^2. Average BSA: 0.602 m^2

With Weight = 20 and Height = 115 as the stated inputs, the result is Mosteller = 0.799 m^2, DuBois & DuBois = 0.8 m^2 and Haycock = 0.797 m^2. Each value corresponds to the declared output fields.

Example 4: Obese Individual — 130 kg, 170 cm

Inputs

weight_kg: 130 height_cm: 170
Mosteller: 2.478 m^2. DuBois & DuBois: 2.354 m^2. Haycock: 2.547 m^2. Boyd: 0.043 m^2. Average BSA: 1.855 m^2

With Weight = 130 and Height = 170 as the stated inputs, the result is Mosteller = 2.478 m^2, DuBois & DuBois = 2.354 m^2 and Haycock = 2.547 m^2. Each value corresponds to the declared output fields.

Common Use Cases

  • Calculate BSA for chemotherapy dose calculations
  • Estimate BSA for cardiac output and renal function calculations
  • Compare BSA across different formulas for clinical accuracy
  • Used in burn area assessment and pediatric dosing